Fluid-actuated engine



June 1929. E. .1. ARMSTRONG FLUID ACTUATED ENGINE Filed April 12, 1926 3Sheets-Sheet 2 ,decd'.

U. s. mwm 5W m mlw sw m mg M Wm June 18, 1929. E ARMSTR N 1.717.599

FLUID ACTUAfIED ENGINE Filed April 12, 1926 3 Sheets-Sheet 3 I N V EN TR. Edwin Jflrmsi'rong by Jil Tflrmstroiggazzd 5.5. Benedict.Z'xemfirzcas.

Patented June 18, 1929.

warren STATES rn see PATENT-OFF E. P

EDWIN J. emss'rno ve, nnonnsnn, LATE on ERIE, PENNSYLVANIA, BY :iEssIEw.. Amrsraone AND BEATRICE A. isnnnnlcrr, exnournrcesyor ERIE, PnNnsYLVANIA, ASSIGNORS, BY ivrnsnn ASSIGNMENTS, T0 BucYRns-nnin COMPANY, 0

SOUTH MILWAUKEE, WISCQN SI1\T.A CORPORATION OF DELAWARE.

' FLUID-ACTUATED ENGINE.

. Application filed April 12, 1926. Serial No. 101,419.

In many fluid-actuated engines it is desirable to conveniently controlthe position of the eccentric controlling the valves, of the engine.This is particularly trueas to'the reversal of the engine. WVith enginessuch as are used on power excavating devices, and in similar situationswhere reversals are of great frequency and the reversal control is onlyone of a number of controlled movements which require the attention ofthe operator it is of greatimportance to simplify throttle givingaldirection of movement to the engine in a reverse direction. Featuresand d etails of the invention will appear from the specification andclaims.

The invention is illustrated in the accompanying drawings as tollows:-

Fig. 1 shows a planview otthe engine.

Fig. 2 a side elevation, partly in section, showing the valve andeccentric construction.

Fig. 3 a section of the eccentric control mechanism on the line 3-3 inFig. 4 with the eccentric thrown to drive the engine in a forwarddirection.

Fig. 4 an end elevation of the same.

Fig. 5 a sectional view through the throttle and reversing valve showingthe same in a neutral position, d

Fig. 6 a similar view with the throttle partly opened fora forwardmovement of the engine. u

F 7 is a diagram showing the-relative crank and eccentric positions inFig. 3.

Fig. 8 a section similar to Fig. 3 with the eccentric thrown. to reversethe'direction of movement oft-he engine.

.the inner end of the end element 16 Fig. 9 a sectional view of theactuating, mechanism on the line 99 in Fig. 8. i Fig. v10 asectionsimilar to Fig. 5 withthe valve set for a reverse motion of the,engine and putting the controlling mechanism in the position shown inFigs. 8 and 9. I Fig. 11 a viewsimilar to Fig. 10 but with the, throttleadvanced to a steam to the engine. I

Fig. 12 a section on the line 12 12 in Fig. 10. H i- Fig. 13 adiagramshowing the. relative crank and eccentric positions with the conposition admitting trol mechanism in the position shown in a 1 marks thetramefof the engine, 2 the cylinders, 3 the valvechest, 4 the "crankshaft, 4: the..cranl;s,*4 bearings, for the crank shaft, 5 connectingrods, 6 crossheads, 7 cross head, guides, 8 piston rods, 9 pistons, 10steam; ports leading from the cylinder to the engine valve chamber 11,12 steam passages leading from thechamber ll through a port 18 to thethrottle valve chamber 14, 15 i exhaust ports leading from the valvecharm bei ll, 16 the end elements of the engine valve'16, said elementsoperating across the ports 10 and 15 17 the center element of the valveoperating over the ports or'passages. 12.. This IStllGordlnarycylindmcal engine valve construction cutting oii' the (fluid onrods 18 and 19 lead from'thevalves 16. The

rod 18 is connected witha rocker 2O .iormed on a sleeve 21. The sleeve21 is carried in a bearing 22 and is provided with a rocker 23. Therocker 23 is connected by'an eccentric rod 2 1 with an eccentric strap'25 and, the eccentric strap is mounted on. an eccentric 26. The rod 19has a rocker 27 carried by a shaft 28. The shaft 28 extends through thesleeve 21 and has a rocker-29 at its outer end. The rocker 29 isconnected by a link with a bell crank lever The bell crank lever 31 ismounted on a pin32 and 'is connected a link 33 with the eccentric 26operating at from the rod 2tsoas to operate the engines with the angularrelation of the cranks as indicated.

I so Valve eccentric.

ber 14 througha pipe 14 and the valve 3%.

' A throttle valve 34 .is of a sliding. type operating on a valve face34 in'the chamber 14:. It has ports 35' and'36 extending through it andeach of these ports is adapted to be brought into register with the port13 leading to the valve chamber 11. Either of the ports 35 or 36 deliversteam, or fluid to the engine, the purpose of the two ports 7 being togive the throttle a double opening so that the throttle may be connectedWltll the controlling means for. positioning the Fluid is delivered tothe chamis connected by a valve rod 34 with an opcrating'lever 34. 7

A carrier 37 is mounted onthe end of the crank shaft being lockedbymea-ns of a key 37?". A rock shaft 38 is journalled in bearings 89 inthe carrier and the eccentric '26 is locked on therock-shaft'38 by meansof a key 40. A rock lever 41- isalso locked on the rock shaft by meansof a key 42. A rod 43 is connected with one end of the rock leverbymeans of a pin it A 'sprin'gvbase 1 45 ismounted on the rod e3'and aspring 46 is'seatedon the base 45 and against a base 47, The base d7 iscarried by a sleeve 48,

the sleeve having asmall projection extend- 111g into a socket 49'1nthe'carrier. The spring is of 's'ufiiclent strength to maintain theeccentric in a' position to drive the enon the carrier. TA port 54 leadsfrom the cylinder to aradia-l opening 55 in the crank shaft. Thecrankhas an'axial bore 56 extending from' thefradial opening 55 to theend of the shaft and this connects with a pipe 57 extending into thebore through a stuthng box 58 in the end of the crank shaft.

The pipe 57 extends from a fitting 57 and the fitting is secured toaplate 59 extending from the engine frame. 3 The fitting is con-' nectedby a pipe 60 with a. passagefil in the V be closed with the valve shownas in this position of thevalvecorresponding a port- 62 through thevalve seat 34:

'The position of the port (SQ-is such as t valve chest and the passage61 leads through the position 05 of the handle 34 shown full lines Fig.2. If it is desired to move the engine forward the valve '34: is drawnto the position shown in Fig. "6 opening the port 35 to the port '13 andthis is accomplished without uncovering the "port 62 as clearly shown'iuFig. 6, the position of the handle being at b. If, however, it isdesired to reverse -the engine the "valve is first moved to the positionshown in Fig. 10. By place ingthe handle 34 at position 0 uncovers thepoi-15:62 andputsflrri d-on-the piston 52 throw (71v and usual manner.

ing the parts to the position shown in Fig. 8 and this movement of theeccentric sets the valve gear for a reverse movement. A.

continued movement of the valve to the position shown in Fig- 11 admitssteam byway of the port 36 to the port 13, the handle being in theposition (Z for accomplishing this purpose. This opening of the valvegiving the engine fluid does not close the opening to the port 62 sothat the pressure is maintained on the piston 52-and the valve gear, inits proper relation and the, valve gearis held in this position until itis de sired to close the throttle, the throttle being? closed in advanceof the closing of the port 62. will the return of thevalve mechanism tothe position'shownin Figs. 2- and or the closed position, the port 62'isbrought under the valve passage 63" which connects the port 62 withan exhaust port 65. thus exhausting the fluid from thecylinder 53 andpermitting the return of the valve gear to the position shown in Fig. 3,or a position for a return movementof the engine. The eccentric, it willbe noted is mounted with a carrier center at the axis of the shaft 38and as-the eccentric is swung the center of the eccentric isswungiacross the axis of the crank shaft 4-. Thus while the eccentric is'moved approximately on the carrier: of the shaft '3: the center of theeccentric is moved inthe ordinary manner of swinglngeccentrics'entirely'across the axis of the crank shaft: This swinging ofthe eccentric and its relation to the crank centersis illus tratcd inFigs. and 13 in which the carrier center 6, the eccentriccenter f, thecrank shaft center g, and the centers of the cranks are showndiagrammaticallyin the The eccentric, of course, in the reversal is notcarries tosa position of 180 because it is desired to departfrom this tothe extent of the lap and lead of the valve.

'lVhat claimed as new is In a fluid actuated engine,ithe combinationwith the valve operating parts com- 'prising a cylinder, a piston,engine valve,

crank and crank shaft, connections between the crank and piston,anleccentric, and connections between the eccentric and engine valve, ofa carrier mounted on the crank shaft with an axis eccentric to theshaftand on which the eccentric is sw-ingingly mounted; and afiuideactuated mechanism carried by the carrier controlling the position of the eccentric to reverse the same comprising a rock shaftcarrying the eccentric, a rock arm on the rock shaft, a piston connectedwith the rock arm, a cylinder iii which the piston operates and eringfluid to the cylinder.

2. In a fluid actuated engine, the combination with the valve operatingparts comprisinga cylinder, a piston, engine valve,

means deliv-' crank and crankshaft, connections between the eccentricand engine valve, of a carrier mounted on the crank shaft with an axiseccentric to the shaft and on which the eccentric is swingingly mounted;and a fluidactuated mechanism carried by the carrier controlling theposition of the eccentric to reverse the same comprising a rock shaftcarrying the eccentric, a rock arm on the rock shaft, a piston connectedwith the rock arm, a cylinder in which the piston operates and meansdelivering fluid to the cylinder through the crank shaft.

3. In a fluid actuated engine, the combina tion with the valve operatingparts comprising a cylinder, a piston, engine valve, crank and crankshaft, connections between the eccentric and engine valve, of a carriermounted on the crank shaft and on which the eccentric is swinginglymounted; and a fluidactuated mechanism carried by the carriercontrolling the position of the eccentric comprising a rock shaftcarrying the eccentric, a rock arm on the rock shaft, a piston connectedwith one end of the rock arm, a cylinder in which the piston operates, aspring operating on the opposite end of the rock arm and throwing theeccentric when the piston is relieved of pressure, and means fordelivering fluid to the cylinder.

4. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft driven by the crank,connections between the crank and piston, an eccentric on the shaft, andconnections between the eccentric and the engine valve, of afluid-actuated mechanism acting on the eccentric to throw the same toreverse the engine; a throttle valve; and means actuated with thethrottle valve controlling the mechanism, said means operating by acontinuous movement to position the eccentric in both directions inadvance of the throttle opening and permitting variations of thethrottle valve independently of variations of the position of themechanism.

5. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft driven by tre crank,connections between the crank and piston, an eccentric on the shaft, andconnections between the eccentric and engine valve, of a fluid actuatedmechanism acting on the eccentric to throw the same to reverse theengine; a throttle valve; and means actuated with the throttle valvecontrolling the mechanism, said means operating to position theeccentric in both directions in advance of the throttle opening.

6. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft driven by the crank,connections between the crank and piston, an eccentric on the shaft, andconnections between the eccentric and engine valve, of a fluid actuatedmechanism acting on the cocentric to throw the same-to reverse theengine; a controlling, valve for the mechanism and operating to actuatethe mechanism; and a throttle valve moving with said controlling valveand having two open positions opening after the openingof saidcontrolling valve, said throttle being free to operate at either of saidopen positions without disturbing the mechanism.

7. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft driven by the crank,connections between the crank and piston; an eccentric; and connectionsbetween the eccentric and engine valve, of a fluid actuated mechanismacting on the eccentric to throw the same to reverse the engine; acontrolling valve for the mechanism operating to control the movementofthe mechanism in both directions to reverse the engine; and a throttlevalve moving with said controlling valve and having two open positionsopening after and with a continuing movement of the controlling valve.

8. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft, driven by the crank,connections between the crank and piston, an eccentric on the shaft, andconnections between the eccentric and engine valve, of a 7 fluidactuated mechanism acting on the eccentric to'throw the same to reversethe engine and a valve sliding on a valve seat, said valve seat andvalve being double ported to afford a throttle opening with a movementof the valve in either direction, said valve and valve seat being portedto open to a controlling mechanism, the opening to the controllingmechanism being in each direction in advance of the throttle openin 1 9.In a fluid actuated engine, the combination with a cylinder, a piston,an engine valve, a crank, a shaft driven by the crank, connectionsbetween the crank and piston, an eccentric on the shaft, and connectionsbetween the eccentric and engine valve, of a fluid actuated mechanismacting on the eccentric to throw the same to reverse the engine; and avalve sliding on a valve seat, said valve seat and valve being doubleported to afford a throttle opening with a movement of the valve ineither direction, said valve and valve seat being ported to open to acontrolling mechanism, the throttle openings and openings to thecontrolling mechanism being accomplished by a continuous movement of thevalve in either direction.

10. In a fluid actuated engine, the combination with a cylinder, apiston, an engine valve, a crank, a shaft driven by the crank,connections between the crank and piston, an eccentric on the shaft, andconnections ISO bet-ween the'eccentric and the engine valve, of athrottlevvalve; a fluid actuated mechanism acting on the eccentrictothrow the same to reverse the engine; and a single actuating controlmeans for the throttle alve and said mechanism and controlling the fluidactuated mechanism to throwthe eccentric in advance of the openingof thethrottle in each direction and permitting the Variation of the openingof the throttle independently 10 of a, variation of theCOIltlOlDlBChZLDlSHl when thrown in either direction. 7

In testimony whereof we have hereto set our hands. I JESSIE WV.ARMSTRONG, BEATRICE A. BENEDICT, Ewecutvdces 0 the Estate of Edwin J.

Awmstrong, Deceased.

